package com.tianzehua.netty.socketexample;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.util.CharsetUtil;

/**
 * socket server initializer{@link ChannelInitializer}
 * @author tianzehua
 * @date 2019/03/08
 */
public class MyServerInitializer extends ChannelInitializer<SocketChannel> {
    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline pipeline = ch.pipeline();
        pipeline.addLast(new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE,0,4,0, 4));
        pipeline.addLast(new LengthFieldPrepender(4));
        /* 字符串解码 */
        pipeline.addLast(new StringDecoder(CharsetUtil.UTF_8));
        /* 字符串编码 */
        pipeline.addLast(new StringEncoder(CharsetUtil.UTF_8));
        /* 自定义处理器 */
        pipeline.addLast(new MyServerHandler());
    }
}
